118 



THE AMEEICAN M0:NTHLY 



[June, 



the rilling and the method of mount- 

 ing. 



6. Developing tooth of embryo of 

 a pig. R. R. Andrews. 



Box Cu reached this cii'cuit March 

 1 3th with two very interesting 

 slides : — 



1. A transverse section ot a mush- 

 room, Agarictis campestris. 



2. Prothallus of a fern, belonging 

 to the series of Mr. A. C. Cole. 



Box B was received March 13th, 

 containing : — 



I. Orbitolites. F. M. Hamlin. 

 A very neat mount showing various 

 modifications of orbitolite structure 

 from Bermuda. A good description 

 accompanies the specimen. 



3. Endothelium. S. H. Gage. A 

 fine staining with picrocarmine and 

 silver nitrate. 



3. Developing tooth from human 

 embryo at foin^ months. A. M. Ross. 

 A good specimen well described. 



4. Proboscis of moth. J. D. White. 

 One of Mr. D. Folsom's excellent 

 preparations. 



^. Section of frog's lung. C. JM. 

 Burgess. 



6. Tentacles of jelly-fish. M. S. 

 Wiard. Showing" the stinging cells. 



This box seems to have passed 

 through this circuit before as we find 

 a note of our own on it dated Oct. 

 17, 1SS4. 



Box N, containing two of Cole's 

 preparations, was received April 3d.' 



Box B came to hand April 33d 

 with good preparations. 



I. Section of squash seed. A. B. 

 Hervey. The section shows very 

 well the six layers of cells which Mr. 

 Hervey has observed. 



3. Spores of cinnamon fern, Os- 

 muuda regal is. F. A. Hubbard. 

 ' L. B. H.' asks if the names given to 

 the fern are not *• a little mixed,' evi- 

 dentl}' under the impression that there 

 maybe a mistake somewhere. 



3. Scale of a salt-water worm, 

 S/ga/io/i arenicola. J. M. Crocker. 



4. Diatoms. E. Pent. An unpre- 

 tentious mount, but one of those 

 preparations well known to students 



of diatoms that ^vill repa}- going over 

 with a high-power objective. 



5. Transverse section of branch of 

 PopulusCandicans. O. Fernald. A 

 fine specimen of double staining. 



6. Diatoms on alg^e. W.H.Cur- 

 tis. Some of these are offered in ex- 

 chansre. 



NOTES. 



— The third and fourth parts of ' The 

 Rotifera,' by Hudson and Gosse, pub- 

 lished by Longmans, Green & Co., Lon- 

 don, have been issued. As an indica- 

 tion of the rich field of work that is still 

 open to observers, we note in the Preface 

 that since Dr. Arlidge's edition of Pritch- 

 ard's Infusoria was published, twenty-five 

 years ago, more than 1 20 new species have 

 been discovered and are described in this 

 work, nearly all of which have been dis- 

 covered by the authors. Of these 80 

 have been added within the last fifteen 

 months. The large plates are beautifully 

 drawn and colored. 



— We learn from Messrs. Emmerich 

 & Son that the new J-inch objectives of 

 Mr. Zeiss, made of the new glass, will be 

 in the market very soon — indeed they are 

 expecting daily to receive a supply. 

 Hereafter Mr. Zeiss will not make any 

 more of the celebrated J^^-inch objectives, 

 but will provide another lens to take its 

 place. 



— Mr. Wolle, in a communication to the 

 BuUt'tin of the Torrey Club, has men- 

 tioned some recent publications relative 

 to desmids, among others referring to the 

 article by W. B. Turner in Journ. Royal 

 Micr. Soc, Dec, 1885, in which the author 

 describes desmids of this country which 

 he regards as new. Mr. Wolle shows 

 that only two or three of Mr. Turner's 

 species can be regarded as new, and at 

 the same time indicates how very unsafe 

 it is to venture upon describing new spe- 

 cies of desmids until the variations due to 

 different stages of growth are well known, 

 and these can only be learned by long 

 experience. 



— Mr. W. N. Hastings writes that he 

 has found Floscularia ornata abundant in 

 small ponds (peat holes) early in the 

 spring, while the ice is thawing. Their 

 occurrence under these conditions he has 

 observed for several seasons, but has not 

 seen the fact mentioned in books. 



